Differences are for sure noticeable between the old and the new recipe. New Rodinal works less grain accentuating. This can be measured and observed. Also the devtimes vary between the formulations. If adjusted differences can be minimised.For all the endless threads about the different brands of Rodinal, the history, all the formulas and all the heat the discussions sometimes create, does anyone really see a difference in the final print between the brands? Really?